Hair-dye.



UNITED STA11E B;}TENT OFFICE.

ERNST ERDMANN, OF HALLE-ON-THE-SAALE, GERMANY, ASSIGNOR TO-ACTIEN GESELL- SCHAFT FUR ANILIN FABRIKATION, OF BERLIN, GERMANY.

HAIR-DYE.

Specification of Letters Patent.

Patented J'une 1, 909.

Application. filed February 10, 1906. Serial No. 300,514.

sia, German Empire, have invented new and useful Improvements in Hair-Dye and I do hereby declare that the following is a full, clear, and exact description thereof, wlnch will enable others skilled in the-art to which it appertains to make and use the same.

I have found that by means of a certain class ofamino-sulfonic acids of the benzeneserles of the general formula:

preparations may be obtained which produce property in addition to a natural appearance. -Moreover the preparations I produce are in no way skin.

In the above-given formula:

poisonous, nor do they irritate the R means a hydrogen-atom or the or anic radical; phenyl or tolyl or the like whi e R stands for the group NH or OH; the sulfonic group may have entered the benzene-nucleus shown in the above formula or a benzenenucleus which in the above formula'is represented by the letter R. So'for instance the above formula comprises the following aminosulfonic acids: orthoor para-aminophenolsulfonic acid, an amino-diphenylamin-sul fonic acid, a phenylenediamin-sulfonic acid, a toluylenediamin-sulfonic acid or the homologues or derivatives of such a sulfonic acid. Furthermore I have found that it is possible for the practical use of mypreparations to mix two or more of the amino-sulfonic acids of the above-defined class; in this way shades of any kind and also of natural appearance may be produced. i

Now my present preparations for dyeing hairs preferably contain some other ingredients besides the above amino-sulfonic acids- First a certain proportion of an alkali, such as sodium carbonate, ammonium carbonate or the like, is to be added, preferably such that an alkaline solution is obtained when my preparations are dis solved in water, which solvent is the most convenient and cheapest for the practical use of my preparations. Furthermore it is 1' advant ageous'to mix such a preparation with av small proportion of a'bisulfite, the object of which is to prevent oxidation before using the preparations; obviously any other suitable agent which prevents or retards oxidation will also serve.

The following examples may serve to illustrate my invention, the parts being by weight:

Example 1: Prepare a solution by mixing 100 partsof water, 4 parts of ortho-aminoph'enolsulfonic acid (OH :NH :SO ,H'=v 1 :2 :4) and 1.6 parts of calcined sodium carbonate, thus obtaining a solution of sodium orthoaminophenolsulfonate. This preparation when applied to the hair in presence of an oxidizing agent produces a yellowish blond to blond shade.

cined sodium carbonate in 100 parts of water;

this preparation applied to the hair in presence of an oxidizing agent produces a yello wish blond shade.

Example 3: Prepare a solution from 3 parts of para-aminodiphenylamin-sulfonic acid obtained by the action of sodium bisulfite on para-nitrosodiphenylamin, 3 parts of ortho-a1ninophenol-sulfonic acid (OH:NH

SO H= 1 :2 :4) and 3 parts of calcined sodium carbonate in 100 parts of water, add to this solution 2.4 parts of a sodium hydrogen sulfite solution of 16% per cent. strength; this preparation'applied to the hair in presence of an oxidizing agent produces a brown shade.

Example 4: Prepare the following solution from para-aminodiphenylamin-sulfonic acid obtained by the action of a sulfite on paranitrosodi henylamin, para aminodiphenylamin su fonic acid obtained by sulfonating p ara-amino diphenylamin and orthoa percent. strength. This preparation applied to the hair in presence of an oxidizing agent produces a black shade.

Of course the present invention 1s not the details given therein.

I in what manner the same has to be perlimited to the foregoing examples nor to Instead of the amino-sulfonic acids employed in the foregoing examples other acids of the aforesaid general formula may be used; in such case naturally the pro' ortions of the ingredients may be varied wit in wide limits. Furthermore for the sodium carbonate used in the above examples may be substituted another suitable alkali, such as ammonium carbonate, potassium carbonate or the like. Instead of the sodium hydrogen sulfite mentioned in the foregoing examples there'may be employed another salt of sulfurous acid, or the like.

Having now described my invention and formed what I claim is,-

1. A hair dye consisting of an aqueous solution of a salt of the general formula (C H g so=u I i in which formula R stands for H or an aryl group, R stands for NH or OH, and M stands for the radical of an alkali and an alkali carbonate.

3. A hair dye consisting of an aqueous solution of sodium ortho-aminophenolsulfonate and sodium carbonate.

In witness whereof I have hereunto signed my name this 24th day of January, 1906, in the presence of two subscribing witnesses.

ERNST ERDMANN.

Witnesses RUDOLPH Fmcnn, SoUTHARD P. WARNER. 

